Constant DFU_FIRMWARE_NOT_FOUND error

[amatier]

I'm running the most up-to-date versions of flutter as well as versions of this package.

I'm making my call like this:

 onPressed: () async {
                              final notifier =
                                  ref.read(firmwareNotifierProvider.notifier);
                              final path = await notifier.getFirmwarePath(
                                  latestFirmware.downloadUrl ?? '');
                              print('Firmware path: $path');
                              print('Device remoteId: ${uiState.remoteId}');
                              await NordicDfu().startDfu(
                                uiState.remoteId,
                                path,
                              );
                            },

Where path is set by downloading a .zip file from Firebase and placing it in a temp directory:

Future<String> getFirmwarePath(String url) async {
    // Get the temporary directory
    Directory tempDir = await getTemporaryDirectory();
    // Define the local file path
    String filePath = '${tempDir.path}/file.zip';

    // Use Dio to download the file
    Dio dio = Dio();
    await dio.download(url, filePath);

    if (await File(filePath).exists()) {
      print('Download successful, file is where it should be.');
      return filePath;
    } else {
      throw Exception("Download failed, file's not in the temp directory.");
    }
  }

I received a path back and it appears that half works correctly. The problem is when calling the .startDfu() it fails 10/10 times. I receive this error:

 flutter: ----------------FIREBASE CRASHLYTICS----------------
flutter: PlatformException(DFU_FIRMWARE_NOT_FOUND, Could not dfu zip file, null, null)
flutter: 
#0      StandardMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:651:7)
#1      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:334:18)
<asynchronous suspension>
#2      KeypadDetailsBluetooth.build.<anonymous closure>.<anonymous closure> (package:*project name removed*/features/admin/displays/keypad_settings.dart:319:31)
<asynchronous suspension>
flutter: ----------------------------------------------------

The content of my .zip file is a .bin file named app_update.bin and a manifest file called manifest.json I've tried just passing the .bin file and that fails too. I've tried putting my zip file into assets and going that route and it still fails. I've tried using my .zip file with NRF connect and it works flawlessly. I'm not sure why this is happening here because the error message isn't explicit enough in what it is trying to portray.

Any help is much appreciated.

[joaquin03]

@amatier, did you manage to solve this issue?

[amatier]

@amatier, did you manage to solve this issue?

@joaquin03 I did not, I ended up using a different package to achieve what I wanted to do. I ended up using mcumgr_flutter